Automobile-jack.



J. F. CAR-LOCK, JR.

AUTOMOBILE JACK.

`APPUcATlCm FILED DEC.6.1913.

, 1,14951140' PatentedAug. 3,1915.

Lirama.

, n Jenn r. canteen, m., or nnnms,'monraua.-

* .americana-'JACK 4 speoiaoaan of teneis Patent. l

Applicants maneoemb'er a 1era. serial no. 505,098..

' To all whom it may concern: .I

l of a jack of novel construction, so as to fa- Be it known that I, JoHrLF. CA'RIJOCK,

a citizen of the United States, residing at Dennis, in the county of Custer andState' of Montana, have invented new and' useful Improvements in Automobile Jacks, of

which the following is a specification.

The invention contemplates thel provision cilitate the jacking upof any one of the wheels ofa vehicle when the tire requires at# tention either to repair a puncture, or blowout, or to replace a worn tirebya new one.

The invention consists of thev novel features, details of construction and combina tion of parts, which hereinafterwill be more particularly set forth, illustrated in the acl companying drawings, and pointed out in the appended claim.

Figurel is a View in elevation of a pneumatic jack. Fig. 2 is a sectional view of the jack. Fig. 3 is a sectional detail view showing a vportion of the casing of the jack and clip attached theretoj Corresponding and like` parts are referred -to in the following description, and indicated in all the-views of the drawings, by the same reference characters.

The lifting devices, or jacks, are indicated generally kby the reference letter A and the same may be secured to the end portions of the axle in any manner. Each of the jacks comprises a casing' 1 .Within which a plunger 2 is arranged to operate, the stem 3 of the plunger projecting beyond an end of the casing and having a foot 4 of sufficient area to lenable ample. purchase being obtained 'upon the `surface for. sustaining the load when the jack'isin operation. A 'spring 5 I 40 of theexpansible helical varietyis located within the casing l and isconlined between the plungerfl and the lower end 6 'of the casing and normally holds the plunger ele-` va-ted. The stem'r3 operates through an' opening formed cetrallyintheend 6. `The upper side ofv the plunger 2 is preferably concave to forma seat foriapneumatic Asack A 7. A nipple 8 extends through a side ofthe casing 1 and is connected with the pneumatic sack 7. A relief valve 9 is connected with the pneumatic sack to prevent dan- As' hereinbefore@ gerous internal pressure.

stated ythe device may be secured to the axle in any manner. As indicated in the drawings a clip 10 is provided and is fastened toy the'aXle by means of a set screw 11.

rateaeea aeg. s, reis.

From the foregoing description, taken in p,

connection with. the accompanying drawing,

thcradvantages of the construction and `of the method of operation will be readily apparent to those skilled in the art to which the invention appertains, and while I have described the principle of operation of the invention, together with the device which I now consider' to be lthe best embodiment thereof, I desire to have it understood that the device shown is merely illustrative, and thatsuch 4changes may be made when desired as are within the scope of the claim appended hereto.

Havingthus described the invention what is claimed as new is .l

A pneumatic jack comprising a casing closed at both ends, the lower end being provided with ah opening, a plunger arranged to reciprocate within the casing and'having a stem adapted to project through said opening in one end of the casing, a vpneumatic sack conned between the upper end of the casinggg-and said plunger and adapted when inflated to project said plunger, 'al spring vencircling said stem and operating' to normally maintain the plunger retracted and wholly positioned Within the casing,1said stemterminating to provide a relatively broad foot portion, and' the lower end'of said casing having a correspondingly shaped recess for the reception of said foot to. V-wh'olly conceal the. latter to limit the 'up-.

f 90v In testimony whereof I'aflix my signa-ture'v ward movement of said plunger.

in presence of two' witnesses.'

JOHN F. CARLOCK, JR.

Witnesses:

JOHN Kanon, MARK F. JONES. 

